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| 1 | +using System.Net.Http.Json; |
| 2 | +using System.Text.Json; |
| 3 | +using Microsoft.AspNetCore.Builder; |
| 4 | +using Microsoft.AspNetCore.Http; |
| 5 | +using ChannelFlow.PluginSdk; |
| 6 | + |
| 7 | +namespace ChannelFlow.Plugin.AI; |
| 8 | + |
| 9 | +public class AiProvider |
| 10 | +{ |
| 11 | + public string Id { get; set; } = Guid.NewGuid().ToString(); |
| 12 | + public string Name { get; set; } = ""; |
| 13 | + public string BaseUrl { get; set; } = "https://api.openai.com/v1"; |
| 14 | + public string ApiKey { get; set; } = ""; |
| 15 | + public string Model { get; set; } = "gpt-4o-mini"; |
| 16 | + public string? VisionModel { get; set; } |
| 17 | + public string? TtsModel { get; set; } |
| 18 | + public string? TtsVoice { get; set; } |
| 19 | + public double Temperature { get; set; } = 0.7; |
| 20 | + public bool Enabled { get; set; } = true; |
| 21 | + public int Priority { get; set; } = 0; |
| 22 | + public bool Ollama { get; set; } = false; |
| 23 | +} |
| 24 | + |
| 25 | +public class AiPlugin : IPlugin |
| 26 | +{ |
| 27 | + public PluginManifest Metadata => new("com.channelflow.ai", "AI Provider Suite", "3.0.0", "3.0.0", Category: "ai", |
| 28 | + Permissions: new List<string> { "storage:read", "storage:write", "network:outbound", "api:routes", "ui:pages" }); |
| 29 | + |
| 30 | + private PluginApi? _api; |
| 31 | + private readonly List<AiProvider> _providers = new(); |
| 32 | + private readonly object _lock = new(); |
| 33 | + |
| 34 | + public Task OnLoadAsync(PluginApi api) |
| 35 | + { |
| 36 | + _api = api; |
| 37 | + // Load providers from storage |
| 38 | + _ = LoadProvidersAsync(); |
| 39 | + return Task.CompletedTask; |
| 40 | + } |
| 41 | + |
| 42 | + private async Task LoadProvidersAsync() |
| 43 | + { |
| 44 | + try |
| 45 | + { |
| 46 | + var val = await _api!.Storage.GetAsync("providers"); |
| 47 | + if (val.HasValue && val.Value.ValueKind == JsonValueKind.Array) |
| 48 | + { |
| 49 | + lock (_lock) |
| 50 | + { |
| 51 | + _providers.Clear(); |
| 52 | + foreach (var el in val.Value.EnumerateArray()) |
| 53 | + { |
| 54 | + var p = JsonSerializer.Deserialize<AiProvider>(el.GetRawText(), new JsonSerializerOptions { PropertyNameCaseInsensitive = true }); |
| 55 | + if (p is not null) _providers.Add(p); |
| 56 | + } |
| 57 | + } |
| 58 | + } |
| 59 | + } |
| 60 | + catch { } |
| 61 | + } |
| 62 | + |
| 63 | + private async Task SaveProvidersAsync() |
| 64 | + { |
| 65 | + try |
| 66 | + { |
| 67 | + lock (_lock) |
| 68 | + { |
| 69 | + var json = JsonSerializer.SerializeToElement(_providers); |
| 70 | + _ = _api!.Storage.SetAsync("providers", json); |
| 71 | + } |
| 72 | + } |
| 73 | + catch { } |
| 74 | + } |
| 75 | + |
| 76 | + public Task OnEnableAsync() => Task.CompletedTask; |
| 77 | + public Task OnDisableAsync() => Task.CompletedTask; |
| 78 | + public void OnUnload() { } |
| 79 | + public Task OnConfigAsync(JsonElement config) => Task.CompletedTask; |
| 80 | + |
| 81 | + public void MapRoutes(Microsoft.AspNetCore.Routing.IEndpointRouteBuilder endpoints) |
| 82 | + { |
| 83 | + // GET / - list providers |
| 84 | + endpoints.MapGet("/", () => |
| 85 | + { |
| 86 | + lock (_lock) |
| 87 | + { |
| 88 | + var enabled = _providers.Where(p => p.Enabled).OrderBy(p => p.Priority).ToList(); |
| 89 | + return Results.Ok(new |
| 90 | + { |
| 91 | + providers = _providers, |
| 92 | + chosen = enabled.FirstOrDefault()?.Id |
| 93 | + }); |
| 94 | + } |
| 95 | + }); |
| 96 | + |
| 97 | + // POST /providers - create |
| 98 | + endpoints.MapPost("/providers", async (HttpRequest req) => |
| 99 | + { |
| 100 | + using var reader = new StreamReader(req.Body); |
| 101 | + var json = await reader.ReadToEndAsync(); |
| 102 | + try |
| 103 | + { |
| 104 | + var body = JsonSerializer.Deserialize<AiProvider>(json, new JsonSerializerOptions { PropertyNameCaseInsensitive = true }); |
| 105 | + if (body is null) return Results.BadRequest(new { error = "invalid body" }); |
| 106 | + if (string.IsNullOrEmpty(body.Id)) body.Id = Guid.NewGuid().ToString(); |
| 107 | + lock (_lock) { _providers.Add(body); } |
| 108 | + await SaveProvidersAsync(); |
| 109 | + _api?.Logger.Info($"ai: created provider '{body.Name}'"); |
| 110 | + return Results.Created($"/providers/{body.Id}", body); |
| 111 | + } |
| 112 | + catch (Exception e) { return Results.BadRequest(new { error = e.Message }); } |
| 113 | + }); |
| 114 | + |
| 115 | + // PUT /providers/{id} - update |
| 116 | + endpoints.MapPut("/providers/{id}", async (string id, HttpRequest req) => |
| 117 | + { |
| 118 | + using var reader = new StreamReader(req.Body); |
| 119 | + var json = await reader.ReadToEndAsync(); |
| 120 | + try |
| 121 | + { |
| 122 | + var body = JsonSerializer.Deserialize<AiProvider>(json, new JsonSerializerOptions { PropertyNameCaseInsensitive = true }); |
| 123 | + if (body is null) return Results.BadRequest(new { error = "invalid body" }); |
| 124 | + lock (_lock) |
| 125 | + { |
| 126 | + var idx = _providers.FindIndex(p => p.Id == id); |
| 127 | + if (idx < 0) return Results.NotFound(new { error = $"no provider with id {id}" }); |
| 128 | + body.Id = id; |
| 129 | + _providers[idx] = body; |
| 130 | + } |
| 131 | + await SaveProvidersAsync(); |
| 132 | + return Results.Ok(body); |
| 133 | + } |
| 134 | + catch (Exception e) { return Results.BadRequest(new { error = e.Message }); } |
| 135 | + }); |
| 136 | + |
| 137 | + // DELETE /providers/{id} |
| 138 | + endpoints.MapDelete("/providers/{id}", async (string id) => |
| 139 | + { |
| 140 | + lock (_lock) |
| 141 | + { |
| 142 | + var idx = _providers.FindIndex(p => p.Id == id); |
| 143 | + if (idx < 0) return Results.NotFound(new { error = $"no provider with id {id}" }); |
| 144 | + _providers.RemoveAt(idx); |
| 145 | + } |
| 146 | + await SaveProvidersAsync(); |
| 147 | + return Results.NoContent(); |
| 148 | + }); |
| 149 | + |
| 150 | + // POST /providers/{id}/test - test a saved provider |
| 151 | + endpoints.MapPost("/providers/{id}/test", async (string id, HttpRequest req) => |
| 152 | + { |
| 153 | + AiProvider? provider; |
| 154 | + lock (_lock) { provider = _providers.FirstOrDefault(p => p.Id == id); } |
| 155 | + if (provider is null) return Results.NotFound(new { error = $"no provider with id {id}" }); |
| 156 | + |
| 157 | + using var reader = new StreamReader(req.Body); |
| 158 | + var json = await reader.ReadToEndAsync(); |
| 159 | + JsonElement body = default; |
| 160 | + if (!string.IsNullOrEmpty(json)) body = JsonSerializer.Deserialize<JsonElement>(json); |
| 161 | + |
| 162 | + var report = await TestProviderAsync(provider, body); |
| 163 | + return Results.Ok(report); |
| 164 | + }); |
| 165 | + |
| 166 | + // POST /test - test a draft provider |
| 167 | + endpoints.MapPost("/test", async (HttpRequest req) => |
| 168 | + { |
| 169 | + using var reader = new StreamReader(req.Body); |
| 170 | + var json = await reader.ReadToEndAsync(); |
| 171 | + try |
| 172 | + { |
| 173 | + var provider = JsonSerializer.Deserialize<AiProvider>(json, new JsonSerializerOptions { PropertyNameCaseInsensitive = true }); |
| 174 | + if (provider is null) return Results.BadRequest(new { error = "invalid body" }); |
| 175 | + var report = await TestProviderAsync(provider, default); |
| 176 | + return Results.Ok(report); |
| 177 | + } |
| 178 | + catch (Exception e) { return Results.BadRequest(new { error = e.Message }); } |
| 179 | + }); |
| 180 | + |
| 181 | + // POST /test-all - test all enabled providers in priority order |
| 182 | + endpoints.MapPost("/test-all", async () => |
| 183 | + { |
| 184 | + List<AiProvider> enabled; |
| 185 | + lock (_lock) { enabled = _providers.Where(p => p.Enabled).OrderBy(p => p.Priority).ToList(); } |
| 186 | + var attempts = new List<object>(); |
| 187 | + bool ok = false; |
| 188 | + string? chosen = null; |
| 189 | + foreach (var p in enabled) |
| 190 | + { |
| 191 | + var report = await TestProviderAsync(p, default); |
| 192 | + var probeOk = report.Ok; |
| 193 | + attempts.Add(new { id = p.Id, name = p.Name, ok = probeOk, detail = report.Detail }); |
| 194 | + if (probeOk && !ok) { ok = true; chosen = p.Name; } |
| 195 | + } |
| 196 | + return Results.Ok(new { ok, chosen, attempts }); |
| 197 | + }); |
| 198 | + |
| 199 | + // POST /models - fetch models from a provider |
| 200 | + endpoints.MapPost("/models", async (HttpRequest req) => |
| 201 | + { |
| 202 | + using var reader = new StreamReader(req.Body); |
| 203 | + var json = await reader.ReadToEndAsync(); |
| 204 | + JsonElement body = default; |
| 205 | + if (!string.IsNullOrEmpty(json)) body = JsonSerializer.Deserialize<JsonElement>(json); |
| 206 | + |
| 207 | + var baseUrl = body.TryGetProperty("base_url", out var bu) ? bu.GetString() ?? "" : ""; |
| 208 | + var apiKey = body.TryGetProperty("api_key", out var ak) ? ak.GetString() ?? "" : ""; |
| 209 | + var ollama = body.TryGetProperty("ollama", out var ol) && ol.GetBoolean(); |
| 210 | + |
| 211 | + if (string.IsNullOrWhiteSpace(baseUrl)) |
| 212 | + baseUrl = ollama ? "http://localhost:11434/v1" : "https://api.openai.com/v1"; |
| 213 | + baseUrl = baseUrl.Trim().TrimEnd('/'); |
| 214 | + |
| 215 | + try |
| 216 | + { |
| 217 | + using var http = new HttpClient(); |
| 218 | + var request = http.GetAsync($"{baseUrl}/models"); |
| 219 | + if (!string.IsNullOrWhiteSpace(apiKey) && !ollama) |
| 220 | + http.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", apiKey); |
| 221 | + |
| 222 | + var res = await request; |
| 223 | + if (!res.IsSuccessStatusCode) |
| 224 | + return Results.BadRequest(new { error = $"provider answered {res.StatusCode}" }); |
| 225 | + |
| 226 | + var text = await res.Content.ReadAsStringAsync(); |
| 227 | + using var doc = JsonDocument.Parse(text); |
| 228 | + var models = new List<string>(); |
| 229 | + var arr = doc.RootElement.TryGetProperty("data", out var data) ? data : doc.RootElement; |
| 230 | + if (arr.ValueKind == JsonValueKind.Array) |
| 231 | + { |
| 232 | + foreach (var item in arr.EnumerateArray()) |
| 233 | + { |
| 234 | + var name = item.TryGetProperty("id", out var id) ? id.GetString() : item.GetString(); |
| 235 | + if (!string.IsNullOrEmpty(name)) models.Add(name!); |
| 236 | + } |
| 237 | + } |
| 238 | + models = models.Distinct().OrderBy(m => m).ToList(); |
| 239 | + if (models.Count == 0) return Results.BadRequest(new { error = "provider returned no models" }); |
| 240 | + |
| 241 | + var voices = new[] { "alloy", "echo", "fable", "onyx", "nova", "shimmer", "ash", "ballad", "coral", "sage", "verse" }; |
| 242 | + return Results.Ok(new { ok = true, base_url = baseUrl, models, voices }); |
| 243 | + } |
| 244 | + catch (Exception e) |
| 245 | + { |
| 246 | + return Results.BadRequest(new { error = $"could not reach the provider: {e.Message}" }); |
| 247 | + } |
| 248 | + }); |
| 249 | + } |
| 250 | + |
| 251 | + private async Task<TestReport> TestProviderAsync(AiProvider provider, JsonElement body) |
| 252 | + { |
| 253 | + var baseUrl = provider.BaseUrl.Trim().TrimEnd('/'); |
| 254 | + if (!string.IsNullOrEmpty(provider.ApiKey)) |
| 255 | + { |
| 256 | + // Override from body if provided |
| 257 | + if (body.ValueKind == JsonValueKind.Object) |
| 258 | + { |
| 259 | + if (body.TryGetProperty("base_url", out var bu) && !string.IsNullOrEmpty(bu.GetString())) |
| 260 | + baseUrl = bu.GetString()!.Trim().TrimEnd('/'); |
| 261 | + if (body.TryGetProperty("api_key", out var ak) && !string.IsNullOrEmpty(ak.GetString())) |
| 262 | + provider.ApiKey = ak.GetString()!; |
| 263 | + } |
| 264 | + } |
| 265 | + |
| 266 | + var model = provider.Model; |
| 267 | + if (body.ValueKind == JsonValueKind.Object && body.TryGetProperty("model", out var m) && !string.IsNullOrEmpty(m.GetString())) |
| 268 | + model = m.GetString()!; |
| 269 | + |
| 270 | + try |
| 271 | + { |
| 272 | + using var http = new HttpClient(); |
| 273 | + http.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", provider.ApiKey); |
| 274 | + var sw = System.Diagnostics.Stopwatch.StartNew(); |
| 275 | + var res = await http.PostAsJsonAsync($"{baseUrl}/chat/completions", new |
| 276 | + { |
| 277 | + model = model, |
| 278 | + messages = new[] { new { role = "user", content = "Say OK" } }, |
| 279 | + max_tokens = 5 |
| 280 | + }); |
| 281 | + sw.Stop(); |
| 282 | + var ok = res.IsSuccessStatusCode; |
| 283 | + var detail = ok ? $"responded in {sw.ElapsedMilliseconds}ms" : $"HTTP {(int)res.StatusCode}"; |
| 284 | + return new TestReport(ok, detail); |
| 285 | + } |
| 286 | + catch (Exception e) |
| 287 | + { |
| 288 | + return new TestReport(false, e.Message); |
| 289 | + } |
| 290 | + } |
| 291 | + |
| 292 | + public IEnumerable<UiContribution> UiContributions => Array.Empty<UiContribution>(); |
| 293 | + public PluginHealth Health => new(true, "ok"); |
| 294 | + public IMediaSource? MediaSource => null; |
| 295 | +} |
| 296 | + |
| 297 | +public record TestReport(bool Ok, string Detail); |
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